Sui's Custom Indexing Framework gained a significant upgrade on February 4, 2026, when the network elevated gRPC (Google Remote Procedure Call) streaming to a primary data delivery channel for indexers. The change shifts the dominant data access pattern from polling, where indexers repeatedly ask nodes for new data, to a push model, where nodes immediately deliver finalized checkpoints to indexers the moment they are confirmed. The upgrade affects both general-purpose indexers used by wallets and block explorers, and application-specific indexers built by individual development teams.

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How the Architecture Changes

Under the previous approach, indexers would query Sui full nodes at regular intervals to check whether new checkpoints had been added. Each request introduces a round-trip delay, and applications are only as current as their last successful query. With gRPC streaming, full nodes maintain an open connection and push finalized checkpoints to indexers without waiting to be asked. The protocol uses HTTP/2 and compact binary serialization via Protocol Buffers, which reduces per-message overhead compared to the JSON-based formats it is replacing.

The framework is not a complete replacement of polling. Developers configuring a streaming-enabled indexer still rely on polling for historical backfill and for reconnection after a dropped stream. Importantly, the framework handles the transition between these two modes automatically. Teams using the existing Custom Indexing Framework can enable streaming by adding a single configuration parameter, streaming-url, alongside their current remote-store-url setting. No changes to checkpoint processing logic are required.

The Sui network's official blog described the update as delivering "real-time checkpoints as soon as they're finalized," with "polling fallback for backfill and recovery" and compatibility with "existing custom indexers."

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Context Within Sui's API Migration

This announcement is one step in a longer infrastructure transition. In July 2025, Sui launched full beta support for gRPC as its canonical API interface, beginning a formal wind-down of JSON-RPC. That migration has a deadline of July 2026, giving developers approximately four months from the time of writing to update their integrations. The February 2026 announcement moves gRPC streaming from beta status to production-grade, which the Foundation says reflects its readiness for applications with real-world performance requirements.

Target use cases include real-time monitoring dashboards, alerting systems, trading infrastructure for decentralized exchanges, analytics pipelines, and wallet backends where data freshness directly affects user experience.

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On-Chain Context

SUI traded at approximately $0.89 as of March 2, 2026, with a market cap near $3.67 billion and a fully diluted valuation around $9.4 billion. Roughly 3.89 billion of the 10 billion total token supply is currently circulating, meaning about 61% of supply is not yet in circulation, a notable dilution consideration for token holders. Daily trading volume stood near $845 million, and SUI ranked 29th by market cap across all cryptocurrencies.

Network TVL peaked at $2.6 billion in October 2025 before consolidating to approximately $1.04 billion in early January 2026. Suilend, the top protocol on Sui by TVL, held $657.5 million in TVL as of Q3 2025. Monthly active developer counts reached 1,300 to 1,400 by mid-2025, representing 219% year-over-year growth.

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Regional Relevance: Africa and South Asia

For developers in Africa and South Asia, the infrastructure shift carries practical weight beyond raw performance numbers.

In Lagos, Nairobi, and Accra, internet conditions can be inconsistent. Polling-based indexers are particularly sensitive to high-latency or intermittent connections because each data request requires a complete round trip. Push-based streaming reduces the number of active connections needed to maintain synchronization, which can meaningfully improve reliability in bandwidth-constrained environments. It also reduces the volume of RPC requests generated, which translates to lower infrastructure costs. That matters for the early-stage startups and independent developers who make up much of the Web3 builder community across sub-Saharan Africa.

Sui has been building its physical presence in Africa. SuiHub Lagos opened on July 15, 2025 as the fourth SuiHub globally. Mysten Labs co-founder Adeniyi Abiodun, who is of Nigerian heritage, has backed a $1.3 million endowment for blockchain developer training in Nigeria specifically. Christian Thompson, Managing Director of the Sui Foundation, said at the hub's launch that "Lagos is home to one of the most energetic tech communities in the world." Nigeria's regulatory environment has also grown more hospitable in recent years: the 2023 ban on crypto transactions was subsequently lifted, and the country's Securities and Exchange Commission launched its "Crypto Smart" initiative to support compliant blockchain activity, making infrastructure-grade tooling increasingly relevant for builders seeking to deploy products in that market.

South Asia, while lacking a dedicated SuiHub as of March 2026, is a significant source of blockchain developer talent globally. India consistently ranks in the top five countries for Web3 developer contributions. Asia broadly, including South Asia, accounts for 36.4% of global Web3 developer activity. Southeast Asia represents a fast-growing segment of that base, with the regional Web3 market projected to reach $6.4 billion by 2030 at a compound annual growth rate of 50.2%. As gRPC becomes Sui's canonical interface ahead of the July 2026 JSON-RPC cutoff, developers across the region evaluating or actively building on Sui will need to plan their migration. The incremental adoption path, requiring only a configuration update rather than an architectural rewrite, is designed to lower that barrier.

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What Comes Next

The July 2026 JSON-RPC deprecation deadline is the most immediate milestone for existing Sui developers. The Foundation has positioned this gRPC streaming upgrade as part of a broader effort to reduce infrastructure overhead for builders on the network. That effort also includes Walrus for decentralized storage, Seal for permission-based encrypted data access, Nautilus for off-chain computation, and DeepBook as an on-chain order book layer. Thompson has described the overall direction plainly: "We're not just a Layer 1: we're building a full developer stack." For teams building latency-sensitive applications on Sui, the February upgrade removes one of the more common friction points in getting reliable, real-time access to on-chain data.